by the time we exclude obama being an antichrist and get past people who think the government had a role in bombing the world trade center and the pentagon, yes, the pentagon. by the time you get past the half of the country that believe kriemt clang is an outright hoax, how do you do the rational thing about something like gun safety? that's our problem, that's "hardball" for now. thanks for being with us. "all in with chris hayes" starts right now. ♪ >>> today was a huge news day in the ongoing political fight against gun violence in this country. the white house threw its most precious and powerful resource, the time and attention of the president of the united states, behind the issue today. the president traveled to denver, colorado, where he was introduced by the local police chief and planked by law enforcement officers to draw washington's attention, again, to gun safety. >> we need parents, we need teachers, we need police officers, we need pastors, we need hunters and sportsmen, americans of every background, to say, we've suffered too much pain and care too much about our ch